61211102072 has 48 divisors (see below), whose sum is σ = 120066740640. Its totient is φ = 29253179648.

The previous prime is 61211102047. The next prime is 61211102089. The reversal of 61211102072 is 27020111216.

61211102072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6694688 + ... + 6703824.

It is an arithmetic number, because the mean of its divisors is an integer number (2501390430).

Almost surely, 2^61211102072 is an apocalyptic number.

It is an amenable number.

61211102072 is a deficient number, since it is larger than the sum of its proper divisors (58855638568).

61211102072 is a wasteful number, since it uses less digits than its factorization.

61211102072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10772 (or 10745 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 61211102072 its reverse (27020111216), we get a palindrome (88231213288).

The spelling of 61211102072 in words is "sixty-one billion, two hundred eleven million, one hundred two thousand, seventy-two".