101211100002 has 24 divisors (see below), whose sum is σ = 219401939484. Its totient is φ = 33719922144.

The previous prime is 101211099991. The next prime is 101211100009. The reversal of 101211100002 is 200001112101.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 80377353081 + 20833746921 = 283509^2 + 144339^2 .

It is a super-2 number, since 2×101211100002² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (101211100009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1389433 + ... + 1460460.

Almost surely, 2^101211100002 is an apocalyptic number.

101211100002 is an abundant number, since it is smaller than the sum of its proper divisors (118190839482).

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

101211100002 is a wasteful number, since it uses less digits than its factorization.

101211100002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851874 (or 2851871 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101211100002 its reverse (200001112101), we get a palindrome (301212212103).

The spelling of 101211100002 in words is "one hundred one billion, two hundred eleven million, one hundred thousand, two".