2111511720212 has 12 divisors (see below), whose sum is σ = 3705613347156. Its totient is φ = 1052765049600.

The previous prime is 2111511720139. The next prime is 2111511720239. The reversal of 2111511720212 is 2120271151112.

It can be written as a sum of positive squares in 2 ways, for example, as 1047011911696 + 1064499808516 = 1023236^2 + 1031746^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747701039 + ... + 747703862.

It is an arithmetic number, because the mean of its divisors is an integer number (308801112263).

Almost surely, 2^{2111511720212} is an apocalyptic number.

It is an amenable number.

2111511720212 is a deficient number, since it is larger than the sum of its proper divisors (1594101626944).

2111511720212 is a wasteful number, since it uses less digits than its factorization.

2111511720212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495405258 (or 1495405256 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 26.

Adding to 2111511720212 its reverse (2120271151112), we get a palindrome (4231782871324).

The spelling of 2111511720212 in words is "two trillion, one hundred eleven billion, five hundred eleven million, seven hundred twenty thousand, two hundred twelve".