101211020001 has 48 divisors (see below), whose sum is σ = 184793749504. Its totient is φ = 51943151232.

The previous prime is 101211019999. The next prime is 101211020039. The reversal of 101211020001 is 100020112101.

It is a happy number.

It is not a de Polignac number, because 101211020001 - 2¹ = 101211019999 is a prime.

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 (101211020201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1639681 + ... + 1700286.

Almost surely, 2^101211020001 is an apocalyptic number.

It is an amenable number.

101211020001 is a deficient number, since it is larger than the sum of its proper divisors (83582729503).

101211020001 is a wasteful number, since it uses less digits than its factorization.

101211020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340030 (or 3340027 counting only the distinct ones).

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

Adding to 101211020001 its reverse (100020112101), we get a palindrome (201231132102).

The spelling of 101211020001 in words is "one hundred one billion, two hundred eleven million, twenty thousand, one".