1020211219901 has 2 divisors, whose sum is σ = 1020211219902. Its totient is φ = 1020211219900.

The previous prime is 1020211219861. The next prime is 1020211220069. The reversal of 1020211219901 is 1099121120201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982772839801 + 37438380100 = 991349^2 + 193490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020211219901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020211219501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510105609950 + 510105609951.

It is an arithmetic number, because the mean of its divisors is an integer number (510105609951).

Almost surely, 2^{1020211219901} is an apocalyptic number.

It is an amenable number.

1020211219901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020211219901 is an equidigital number, since it uses as much as digits as its factorization.

1020211219901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 1020211219901 in words is "one trillion, twenty billion, two hundred eleven million, two hundred nineteen thousand, nine hundred one".