1021106151561 has 8 divisors (see below), whose sum is σ = 1361481992640. Its totient is φ = 680733872432.

The previous prime is 1021106151547. The next prime is 1021106151577. The reversal of 1021106151561 is 1651516011201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021106151561 - 2⁷ = 1021106151433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1021106151511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128421 + ... + 1434818.

It is an arithmetic number, because the mean of its divisors is an integer number (170185249080).

Almost surely, 2^{1021106151561} is an apocalyptic number.

It is an amenable number.

1021106151561 is a deficient number, since it is larger than the sum of its proper divisors (340375841079).

1021106151561 is a wasteful number, since it uses less digits than its factorization.

1021106151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780975.

The product of its (nonzero) digits is 1800, while the sum is 30.

The spelling of 1021106151561 in words is "one trillion, twenty-one billion, one hundred six million, one hundred fifty-one thousand, five hundred sixty-one".