211220221010 has 32 divisors (see below), whose sum is σ = 396767773440. Its totient is φ = 80806321728.

The previous prime is 211220221001. The next prime is 211220221019. The reversal of 211220221010 is 10122022112.

It is an interprime number because it is at equal distance from previous prime (211220221001) and next prime (211220221019).

It is a super-2 number, since 2×211220221010² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220221019) 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, 2465576 + ... + 2549804.

It is an arithmetic number, because the mean of its divisors is an integer number (12398992920).

Almost surely, 2^211220221010 is an apocalyptic number.

211220221010 is a deficient number, since it is larger than the sum of its proper divisors (185547552430).

211220221010 is a wasteful number, since it uses less digits than its factorization.

211220221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95162.

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

Adding to 211220221010 its reverse (10122022112), we get a palindrome (221342243122).

The spelling of 211220221010 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty-one thousand, ten".