20121011019 has 12 divisors (see below), whose sum is σ = 29065113792. Its totient is φ = 13413346800.

The previous prime is 20121011017. The next prime is 20121011021. The reversal of 20121011019 is 91011012102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20121011017) and next prime (20121011021).

It is not a de Polignac number, because 20121011019 - 2¹ = 20121011017 is a prime.

It is a super-2 number, since 2×20121011019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20121010992 and 20121011010.

It is not an unprimeable number, because it can be changed into a prime (20121011017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200134 + ... + 283364.

It is an arithmetic number, because the mean of its divisors is an integer number (2422092816).

Almost surely, 2^20121011019 is an apocalyptic number.

20121011019 is a deficient number, since it is larger than the sum of its proper divisors (8944102773).

20121011019 is a wasteful number, since it uses less digits than its factorization.

20121011019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110098 (or 110095 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The spelling of 20121011019 in words is "twenty billion, one hundred twenty-one million, eleven thousand, nineteen".