2021121202001 has 4 divisors (see below), whose sum is σ = 2204859493104. Its totient is φ = 1837382910900.

The previous prime is 2021121201997. The next prime is 2021121202003. The reversal of 2021121202001 is 1002021211202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2021121202001 - 2² = 2021121201997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021121202003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91869145535 + ... + 91869145556.

It is an arithmetic number, because the mean of its divisors is an integer number (551214873276).

Almost surely, 2^{2021121202001} is an apocalyptic number.

It is an amenable number.

2021121202001 is a deficient number, since it is larger than the sum of its proper divisors (183738291103).

2021121202001 is a wasteful number, since it uses less digits than its factorization.

2021121202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183738291102.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021121202001 its reverse (1002021211202), we get a palindrome (3023142413203).

It can be divided in two parts, 20211 and 21202001, that added together give a palindrome (21222212).

The spelling of 2021121202001 in words is "two trillion, twenty-one billion, one hundred twenty-one million, two hundred two thousand, one".