212121011201010 has 32 divisors (see below), whose sum is σ = 522849627611712. Its totient is φ = 55036802905920.

The previous prime is 212121011200991. The next prime is 212121011201017. The reversal of 212121011201010 is 10102110121212.

It is a happy number.

It is a super-3 number, since 3×212121011201010³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (212121011201017) 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, 95550003936 + ... + 95550006155.

It is an arithmetic number, because the mean of its divisors is an integer number (16339050862866).

Almost surely, 2^{212121011201010} is an apocalyptic number.

212121011201010 is an abundant number, since it is smaller than the sum of its proper divisors (310728616410702).

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

212121011201010 is a wasteful number, since it uses less digits than its factorization.

212121011201010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191100010138.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212121011201010 its reverse (10102110121212), we get a palindrome (222223121322222).

The spelling of 212121011201010 in words is "two hundred twelve trillion, one hundred twenty-one billion, eleven million, two hundred one thousand, ten".