21201201010139 has 2 divisors, whose sum is σ = 21201201010140. Its totient is φ = 21201201010138.

The previous prime is 21201201010091. The next prime is 21201201010147. The reversal of 21201201010139 is 93101010210212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21201201010139 - 2¹² = 21201201006043 is a prime.

It is not a weakly prime, because it can be changed into another prime (21201201060139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600600505069 + 10600600505070.

It is an arithmetic number, because the mean of its divisors is an integer number (10600600505070).

Almost surely, 2^{21201201010139} is an apocalyptic number.

21201201010139 is a deficient number, since it is larger than the sum of its proper divisors (1).

21201201010139 is an equidigital number, since it uses as much as digits as its factorization.

21201201010139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 21201201010139 in words is "twenty-one trillion, two hundred one billion, two hundred one million, ten thousand, one hundred thirty-nine".