1220201001020 has 24 divisors (see below), whose sum is σ = 2562471450000. Its totient is φ = 488071000832.

The previous prime is 1220201001001. The next prime is 1220201001043. The reversal of 1220201001020 is 201001020221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1220201000992 and 1220201001010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 528731 + ... + 1649229.

It is an arithmetic number, because the mean of its divisors is an integer number (106769643750).

Almost surely, 2^{1220201001020} is an apocalyptic number.

1220201001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220201001020 is an abundant number, since it is smaller than the sum of its proper divisors (1342270448980).

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

1220201001020 is a wasteful number, since it uses less digits than its factorization.

1220201001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174957 (or 1174955 counting only the distinct ones).

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

Adding to 1220201001020 its reverse (201001020221), we get a palindrome (1421202021241).

The spelling of 1220201001020 in words is "one trillion, two hundred twenty billion, two hundred one million, one thousand, twenty".