1022201010020 has 72 divisors (see below), whose sum is σ = 2194956965880. Its totient is φ = 399872450560.

The previous prime is 1022201010011. The next prime is 1022201010029. The reversal of 1022201010020 is 200101022201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1022201010011) and next prime (1022201010029).

It can be written as a sum of positive squares in 4 ways, for example, as 125119253284 + 897081756736 = 353722^2 + 947144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1022201009983 and 1022201010010.

It is not an unprimeable number, because it can be changed into a prime (1022201010029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62241410 + ... + 62257830.

It is an arithmetic number, because the mean of its divisors is an integer number (30485513415).

Almost surely, 2^{1022201010020} is an apocalyptic number.

1022201010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022201010020 is an abundant number, since it is smaller than the sum of its proper divisors (1172755955860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1022201010020 is a wasteful number, since it uses less digits than its factorization.

1022201010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17933 (or 17884 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1022201010020 its reverse (200101022201), we get a palindrome (1222302032221).

The spelling of 1022201010020 in words is "one trillion, twenty-two billion, two hundred one million, ten thousand, twenty".