1211012002101 has 16 divisors (see below), whose sum is σ = 1761492515328. Its totient is φ = 733938121200.

The previous prime is 1211012002087. The next prime is 1211012002121. The reversal of 1211012002101 is 1012002101121.

It is not a de Polignac number, because 1211012002101 - 2⁵ = 1211012002069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211012002121) 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, 3773736 + ... + 4082046.

It is an arithmetic number, because the mean of its divisors is an integer number (110093282208).

Almost surely, 2^{1211012002101} is an apocalyptic number.

1211012002101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1211012002101 is a deficient number, since it is larger than the sum of its proper divisors (550480513227).

1211012002101 is a wasteful number, since it uses less digits than its factorization.

1211012002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427352.

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

Adding to 1211012002101 its reverse (1012002101121), we get a palindrome (2223014103222).

It can be divided in two parts, 121 and 1012002101, that multiplied together give a palindrome (122452254221).

The spelling of 1211012002101 in words is "one trillion, two hundred eleven billion, twelve million, two thousand, one hundred one".