2211212310021 has 144 divisors (see below), whose sum is σ = 3907028684160. Its totient is φ = 1234506873600.

The previous prime is 2211212309981. The next prime is 2211212310029. The reversal of 2211212310021 is 1200132121122.

It is not a de Polignac number, because 2211212310021 - 2¹⁷ = 2211212178949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2211212309976 and 2211212310003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211212310029) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 287652240 + ... + 287659926.

It is an arithmetic number, because the mean of its divisors is an integer number (27132143640).

Almost surely, 2^{2211212310021} is an apocalyptic number.

It is an amenable number.

2211212310021 is a deficient number, since it is larger than the sum of its proper divisors (1695816374139).

2211212310021 is a wasteful number, since it uses less digits than its factorization.

2211212310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8265 (or 8235 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2211212310021 its reverse (1200132121122), we get a palindrome (3411344431143).

The spelling of 2211212310021 in words is "two trillion, two hundred eleven billion, two hundred twelve million, three hundred ten thousand, twenty-one".