61120321221 has 16 divisors (see below), whose sum is σ = 86299344000. Its totient is φ = 38344747008.

The previous prime is 61120321211. The next prime is 61120321271. The reversal of 61120321221 is 12212302116.

61120321221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61120321221 - 2¹⁴ = 61120304837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61120321211) 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, 311760 + ... + 468438.

It is an arithmetic number, because the mean of its divisors is an integer number (5393709000).

Almost surely, 2^61120321221 is an apocalyptic number.

It is an amenable number.

61120321221 is a deficient number, since it is larger than the sum of its proper divisors (25179022779).

61120321221 is a wasteful number, since it uses less digits than its factorization.

61120321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164348.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 61120321221 its reverse (12212302116), we get a palindrome (73332623337).

The spelling of 61120321221 in words is "sixty-one billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-one".