20121222971 has 2 divisors, whose sum is σ = 20121222972. Its totient is φ = 20121222970.

The previous prime is 20121222923. The next prime is 20121222983. The reversal of 20121222971 is 17922212102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121222971 - 2²² = 20117028667 is a prime.

It is a super-2 number, since 2×20121222971² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20121222911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060611485 + 10060611486.

It is an arithmetic number, because the mean of its divisors is an integer number (10060611486).

Almost surely, 2^20121222971 is an apocalyptic number.

20121222971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121222971 is an equidigital number, since it uses as much as digits as its factorization.

20121222971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 20121222971 in words is "twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, nine hundred seventy-one".