211221010001010 has 16 divisors (see below), whose sum is σ = 506930424002496. Its totient is φ = 56325602666928.

The previous prime is 211221010001003. The next prime is 211221010001017. The reversal of 211221010001010 is 10100010122112.

It is an interprime number because it is at equal distance from previous prime (211221010001003) and next prime (211221010001017).

It is a super-2 number, since 2×211221010001010² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211221010001017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3520350166654 + ... + 3520350166713.

It is an arithmetic number, because the mean of its divisors is an integer number (31683151500156).

Almost surely, 2^{211221010001010} is an apocalyptic number.

211221010001010 is an abundant number, since it is smaller than the sum of its proper divisors (295709414001486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211221010001010 is a wasteful number, since it uses less digits than its factorization.

211221010001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7040700333377.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 211221010001010 its reverse (10100010122112), we get a palindrome (221321020123122).

The spelling of 211221010001010 in words is "two hundred eleven trillion, two hundred twenty-one billion, ten million, one thousand, ten".