1201002220021 has 16 divisors (see below), whose sum is σ = 1396777392000. Its totient is φ = 1024303408128.

The previous prime is 1201002220009. The next prime is 1201002220027. The reversal of 1201002220021 is 1200222001021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1201002220021 - 2²⁷ = 1200868002293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201002219983 and 1201002220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201002220027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80824596 + ... + 80839453.

It is an arithmetic number, because the mean of its divisors is an integer number (87298587000).

Almost surely, 2^{1201002220021} is an apocalyptic number.

It is an amenable number.

1201002220021 is a deficient number, since it is larger than the sum of its proper divisors (195775171979).

1201002220021 is a wasteful number, since it uses less digits than its factorization.

1201002220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161664108.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1201002220021 its reverse (1200222001021), we get a palindrome (2401224221042).

The spelling of 1201002220021 in words is "one trillion, two hundred one billion, two million, two hundred twenty thousand, twenty-one".