211221021010 has 32 divisors (see below), whose sum is σ = 381485738880. Its totient is φ = 84202493568.

The previous prime is 211221020957. The next prime is 211221021041. The reversal of 211221021010 is 10120122112.

It is a super-2 number, since 2×211221021010² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6276489 + ... + 6310051.

It is an arithmetic number, because the mean of its divisors is an integer number (11921429340).

Almost surely, 2^211221021010 is an apocalyptic number.

211221021010 is a deficient number, since it is larger than the sum of its proper divisors (170264717870).

211221021010 is a wasteful number, since it uses less digits than its factorization.

211221021010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35682.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211221021010 its reverse (10120122112), we get a palindrome (221341143122).

The spelling of 211221021010 in words is "two hundred eleven billion, two hundred twenty-one million, twenty-one thousand, ten".