2111220210021 has 16 divisors (see below), whose sum is σ = 3191048091840. Its totient is φ = 1230832834560.

The previous prime is 2111220210019. The next prime is 2111220210053. The reversal of 2111220210021 is 1200120221112.

It is not a de Polignac number, because 2111220210021 - 2¹ = 2111220210019 is a prime.

It is a super-2 number, since 2×2111220210021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111220210221) 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, 1424574300 + ... + 1424575781.

It is an arithmetic number, because the mean of its divisors is an integer number (199440505740).

Almost surely, 2^{2111220210021} is an apocalyptic number.

It is an amenable number.

2111220210021 is a deficient number, since it is larger than the sum of its proper divisors (1079827881819).

2111220210021 is a wasteful number, since it uses less digits than its factorization.

2111220210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2849150116.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2111220210021 its reverse (1200120221112), we get a palindrome (3311340431133).

The spelling of 2111220210021 in words is "two trillion, one hundred eleven billion, two hundred twenty million, two hundred ten thousand, twenty-one".