101020111109978 has 8 divisors (see below), whose sum is σ = 153232752807540. Its totient is φ = 49942526840800.

The previous prime is 101020111109963. The next prime is 101020111109987. The reversal of 101020111109978 is 879901111020101.

It can be written as a sum of positive squares in 2 ways, for example, as 92698634328169 + 8321476781809 = 9628013^2 + 2884697^2 .

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

It is a super-2 number, since 2×101020111109978² (a number of 29 digits) contains 22 as substring.

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, 283764356873 + ... + 283764357228.

Almost surely, 2^{101020111109978} is an apocalyptic number.

101020111109978 is a deficient number, since it is larger than the sum of its proper divisors (52212641697562).

101020111109978 is an equidigital number, since it uses as much as digits as its factorization.

101020111109978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567528714192.

The product of its (nonzero) digits is 9072, while the sum is 41.

The spelling of 101020111109978 in words is "one hundred one trillion, twenty billion, one hundred eleven million, one hundred nine thousand, nine hundred seventy-eight".