1211320200029 has 2 divisors, whose sum is σ = 1211320200030. Its totient is φ = 1211320200028.

The previous prime is 1211320199983. The next prime is 1211320200067. The reversal of 1211320200029 is 9200020231121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1180486596004 + 30833604025 = 1086502^2 + 175595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211320200029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211320199977 and 1211320200013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211320200329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605660100014 + 605660100015.

It is an arithmetic number, because the mean of its divisors is an integer number (605660100015).

Almost surely, 2^{1211320200029} is an apocalyptic number.

It is an amenable number.

1211320200029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211320200029 is an equidigital number, since it uses as much as digits as its factorization.

1211320200029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 1211320200029 in words is "one trillion, two hundred eleven billion, three hundred twenty million, two hundred thousand, twenty-nine".