1020020002221 has 32 divisors (see below), whose sum is σ = 1494267010560. Its totient is φ = 613786334400.

The previous prime is 1020020002213. The next prime is 1020020002277. The reversal of 1020020002221 is 1222000200201.

It is not a de Polignac number, because 1020020002221 - 2³ = 1020020002213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020020002197 and 1020020002206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020002201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4098066 + ... + 4339836.

It is an arithmetic number, because the mean of its divisors is an integer number (46695844080).

Almost surely, 2^{1020020002221} is an apocalyptic number.

1020020002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020020002221 is a deficient number, since it is larger than the sum of its proper divisors (474247008339).

1020020002221 is a wasteful number, since it uses less digits than its factorization.

1020020002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242697.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020020002221 its reverse (1222000200201), we get a palindrome (2242020202422).

The spelling of 1020020002221 in words is "one trillion, twenty billion, twenty million, two thousand, two hundred twenty-one".