61021012 has 12 divisors (see below), whose sum is σ = 115001236. Its totient is φ = 28163520.

The previous prime is 61020977. The next prime is 61021031. The reversal of 61021012 is 21012016.

61021012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6320196 + 54700816 = 2514^2 + 7396^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 61020983 and 61021001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586689 + ... + 586792.

Almost surely, 2^61021012 is an apocalyptic number.

It is an amenable number.

61021012 is a deficient number, since it is larger than the sum of its proper divisors (53980224).

61021012 is a wasteful number, since it uses less digits than its factorization.

61021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173498 (or 1173496 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 61021012 is about 7811.5947155494. The cubic root of 61021012 is about 393.6949118531.

Adding to 61021012 its reverse (21012016), we get a palindrome (82033028).

The spelling of 61021012 in words is "sixty-one million, twenty-one thousand, twelve".